Describe preterm human milk's protein concentration and fortification needs.

• A. Preterm milk has low protein that remains constant; fortification unnecessary
• B. Preterm human milk often has higher protein concentration which decreases with lactation; fortifiers are needed to meet protein, calcium, phosphorus and sodium needs
• C. Protein levels are irrelevant to fortification
• D. Protein concentration is lower and increases with lactation; fortification is optional

Answer: (B)